Python - Ayuda Problema programa dibujo práctica

import tkinter

import random

from turtle import*

window=tkinter.Tk()

print("¿Cómo te ves?")

button_1=tkinter.Button(window,text="Quiero mi copo",width=80)

button_1.pack(padx=10,pady=10)

button_2=tkinter.Button(window,text="Prefiero dibujar yo",width=80)

button_2.pack(padx=10,pady=10)

button_3=tkinter.Button(window,text="Salir",width=80)

button_3.pack(padx=10,pady=10)

def onClick_1(event):

    colors=["white","yellow","orange","HotPink","red"]

    shape("turtle")

    speed(10)

    pensize(5)

    Screen().bgcolor("blue")

    def vshape():

        right(25)

        forward(50)

        backward(50)

        left(50)

        forward(50)

        backward(50)

        right(25)

    def snowflakearm():

        for x in range(0,4):

            forward(30)

            vshape()

        backward(120)

    def snowflake():

        for y in range(0,12):

            color(random.choice(colors))

            snowflakearm()

            right(30)

    snowflake()

def onClick_2(event):

    window=tkinter.Tk()

    canvas=tkinter.Canvas(window, width=750, height=500, bg="yellow")

    canvas.pack()

    color="red"

    def store_position(event):

        global lastX, lastY

        lastX=event.x

        lastY=event.y

    def on_click(event):

        store_position(event)

    def on_drag(event):

        canvas.create_line(lastX, lastY, event.x, event.y, fill=color, width=4)

        store_position(event)

    canvas.bind("<Button-1>", on_click)

    canvas.bind("<B1-Motion>", on_drag)

    red_id=canvas.create_rectangle(10, 10, 30, 30, fill="red")

    blue_id=canvas.create_rectangle(10, 35, 30, 55, fill="blue")

    black_id=canvas.create_rectangle(10, 60, 30, 80, fill="black")

    green_id=canvas.create_rectangle(10, 85, 30, 105, fill="green")

    yellow_id=canvas.create_rectangle(10, 110, 30, 130, fill="yellow")

    def set_color_red(event):

        global color

        color="red"

    def set_color_blue(event):

        global color

        color="blue"

    def set_color_black(event):

        global color

        color="black"

    def set_color_green(event):

        global color

        color="green"

    def set_color_yellow(event):

        global color

        color="yellow"

    canvas.tag_bind(red_id, "<Button-1>", set_color_red)

    canvas.tag_bind(blue_id, "<Button-1>", set_color_blue)

    canvas.tag_bind(black_id, "<Button-1>", set_color_black)

    canvas.tag_bind(green_id, "<Button-1>", set_color_green)

    canvas.tag_bind(yellow_id, "<Button-1>", set_color_yellow)

def onClick_3(event):

    exit(window)

button_1.bind("<ButtonRelease>",onClick_1)

button_2.bind("<ButtonRelease>",onClick_2)

button_3.bind("<ButtonRelease>",onClick_3)

window.mainloop()